package com.sky.aspect;

import com.sky.anno.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.anno.AutoFill)")
    public void pointcut(){}

    @Before("pointcut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("开始进行数据填充");
        // 获取被拦截的方法上的数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();
        log.info("数据库操作类型：{}", operationType);

        //获取被拦截的方法的参数--实体对象
        Object[] args = joinPoint.getArgs();
        Object object = args[0];

        //准备赋值的数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        //根据数据库操作类型，通过反射来赋值

        if (operationType == OperationType.INSERT) {
            // 插入4个值
            try {
                Method setCreateTime = object.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = object.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = object.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = object.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                // 调用方法，实现赋值
                setCreateTime.invoke(object, now);
                setCreateUser.invoke(object, currentId);
                setUpdateTime.invoke(object, now);
                setUpdateUser.invoke(object, currentId);

            } catch (Exception e) {
                e.printStackTrace();
            }

        }else if(operationType == OperationType.UPDATE){
            // 更新2个值
            try {

                Method setUpdateTime = object.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = object.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                // 调用方法，实现赋值
                setUpdateTime.invoke(object, now);
                setUpdateUser.invoke(object, currentId);

            } catch (Exception e) {
                e.printStackTrace();
            }
        }


    }
}
